Question

Which of the following quadratic equations has roots 3 , 5 ? 1 point (C) x² - 8x +15 =0 (A) x² - 15x + 8 =0 (B) x² +8x -15 =0 (D) x² + 3x +5 = 0

Answer 1

Answer:

Answer is option C. $x^{2}$-8x+15=0

Step-by-step explanation:

Here are the steps:

$x^{2}$ -8x+15=0

finding roots by factorizing:

$x^{2}$-3x-5x+15=0

x(x-3)-5(x-3)=0

(x-5)(x-3)=0

therefore,

x-5=0   or   x-3=0

x=+5     or   x=+3

therefore the roots are 3 and 5.

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